AI Article Synopsis
- The paper highlights the significance of Pluronic F127 in enhancing the porosity of mesoporous alumina made from boehmite colloids.
- The authors demonstrate that by adjusting the amount of Pluronic F127, the porosity of γ-Al(2)O(3) can be increased by 400%, with pore sizes growing from 5 to 14 nm.
- Additionally, these improvements in texture and stability make the F127-modified alumina better suited for catalytic applications.
Article Abstract
In this paper we emphasise the important role of Pluronic F127 on the porosity of mesoporous alumina prepared from boehmite colloids. By focusing on the F127/boehmite interactions we show how the concepts of interface science may help to predict and improve the textural characteristics of mesoporous alumina. By varying the synthetic parameters, in particular the copolymer content, we show that the porosity of γ-Al(2)O(3) can be enhanced by 400% and the average pore diameter can be expanded from 5 to 14 nm. These results are discussed in terms of interactions between the Pluronic F127 and boehmite colloids, and are correlated to the critical micelle concentration (CMC) of the copolymer. The textural characteristics of the mesoporous alumina can be further improved either by introducing hydrocarbons in the preformed boehmite/copolymer sols or by concentrating the sols. In comparison with as-synthesised alumina, those prepared with F127 showed improved thermal stability. Furthermore, boehmite/copolymer sols were stable for all surfactant concentrations investigated and can give high quality coatings suitable for catalytic applications.
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| http://dx.doi.org/10.1016/j.jcis.2011.08.087 | DOI Listing |
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